.middle > div {
    border: 1px solid gray;
}

/*cc {*/
/*    color: rgb(230, 145, 55);*/
/*    font-size: 40px;*/
/*    line-height: 40px;*/
/*    vertical-align: middle;*/

/*}*/

/*fff {*/
/*    color: gray;*/
/*    font-size: 10px;*/
/*}*/

.content > div:nth-child(1) {
    text-align: center;
    margin: 30px 0;
}

.content > div:nth-child(1) > div:nth-child(1) {
    display: flex;
    justify-content: center;
}

.content > div:nth-child(1) > div:nth-child(1) > div:nth-child(1) {
    display: flex;
    align-items: center;
}

.content > div:nth-child(1) > div:nth-child(1) > div:nth-child(1) > div:nth-child(1) {
    color: rgb(230, 145, 55);
    font-size: 40px;
}

.content > div:nth-child(1) > div:nth-child(1) > div:nth-child(1) > div:nth-child(2) {
    color: gray;
    font-size: 10px;
}

/*----------------------------留言--------------*/
.content > div:nth-child(2) {
    display: flex;
    justify-content: center;
}

form {
    /*border: 1px solid red;*/
    width: 600px;
}

form > div > div {
    line-height: 30px;
}

/*所有的标签全部是通过div来封装的组件，只不过需要和css和JavaScript进行联合编辑*/
/*form > div > div:nth-child(2) {*/
/*    border: 1px dashed gray;*/
/*    background-color: rgb(238, 238, 238);*/
/*    height: 30px;*/
/*    padding: 0 10px;*/
/*}*/
input, textarea {
    width: 600px;
    border: 1px dashed gray;
    background-color: rgb(238, 238, 238);
    padding: 0 10px;
}

input {
    height: 30px;
}

textarea {
    height: 100px;
}

input[type=button] {
    background-color: rgb(230, 145, 55);
    padding: 5px 15px;
    width: 100px;
}

form > div:last-child {
    display: flex;
    justify-content: center;
    margin: 30px 0;
}